Myriophyllum rubricaule sp. nov., a M. aquaticum look-alike only known in cultivation

  • Johan L.C.H. Van Valkenburg National Reference Centre for plant health, NVWA, Geertjesweg 15, 6706 EA Wageningen/Postbus 9102, 6700 HC Wageningen, The Netherlands https://orcid.org/0000-0001-7281-7819
  • Leni (H.) Duistermaat Naturalis Biodiversity Center, Darwinweg 2, 2333 CR Leiden/Postbus 9517, 2300 RA Leiden, The Netherlands https://orcid.org/0000-0002-0931-030X
  • Edu Boer National Reference Centre for plant health, NVWA, Geertjesweg 15, 6706 EA Wageningen/Postbus 9102, 6700 HC Wageningen, The Netherlands
  • Tom M. Raaymakers National Reference Centre for plant health, NVWA, Geertjesweg 15, 6706 EA Wageningen/Postbus 9102, 6700 HC Wageningen, The Netherlands https://orcid.org/0000-0003-1056-7177
Keywords: Myriophyllum, water-milfoil, EU regulation no. 1143/2014, invasive plant, horticulture

Abstract

A confusingly labeled water-milfoil of obscure status, known only in cultivation, is here formally described as a new species, Myriophyllum rubricaule Valk. & Duist. sp. nov. This species has fully replaced M. aquaticum in the horticultural trade in Europe since the addition of M. aquaticum to the list of invasive alien species of Union concern (EU regulation no. 1143/2014) in 2016. This manuscript provides a morphological description of M. rubricaule sp. nov., and its distinction from M. aquaticum is further supported by molecular data (chloroplast and nuclear loci).

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Published
2022-07-05
How to Cite
Van Valkenburg, J. L., Duistermaat, L. (H.), Boer, E., & Raaymakers, T. M. (2022). Myriophyllum rubricaule sp. nov., a M. aquaticum look-alike only known in cultivation. European Journal of Taxonomy, 828(1), 1-15. https://doi.org/10.5852/ejt.2022.828.1847
Section
Research article